This study aimed to investigate the forming limit diagrams (FLDs), mechanical properties, and bending behavior of the three kinds of sandwich composites. The core layer in all sandwich sheets consisted of polyethylene, and just the skin layers were chosen to be AA5754 or AA3105. The results showed that the sandwich sheets are an appropriate choice to be used instead of the monometallic sheets. According to the 3-point bending test results, the flexural strength of the AL 3105/Polyethylene/AL 3105 sandwich composite is about 30 percent less than the AA3105 monometallic layer. Also, the formability of the metallic sandwich composites with non-identical skin layers was studied. The results demonstrated that using one layer AA 3105 and one layer AA5754 instead of AA5754 for both skin layers, although formability decreased about 11% in the plane strain region, the cost of fabricating the composite was decreased sheet reduces almost 75%. As a result, using skin layers with the different grades of aluminum is an appropriate way to reduce the cost of fabricating the aluminum-polymer sandwich composites, in which the formability does not decrease significantly.

本研究旨在研究三种夹层复合材料的成形极限图（FLD）、力学性能和弯曲行为。所有夹芯板的芯层均由聚乙烯组成，仅选择表层为 ​​AA5754 或 AA3105。结果表明，夹层板是替代单金属板的合适选择。根据3点弯曲试验结果，AL 3105/聚乙烯/AL 3105夹层复合材料的弯曲强度比AA3105单金属层低约30%。此外，还研究了具有不同表层的金属夹层复合材料的成型性。结果表明，使用一层 AA 3105 和一层 AA5754 代替 AA5754 用于两个表层，尽管平面应变区域的成形性降低了约 11%，但制造复合材料的成本降低了近 75%。因此，使用具有不同铝等级的表层是降低铝-聚合物夹层复合材料制造成本的合适方法，其中成型性不会显着降低。